| 2003年新疆巴楚—伽师地震序列的双差法重新定位研究 |
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| 引用本文： | 黄媛,杨建思,张天中.2003年新疆巴楚—伽师地震序列的双差法重新定位研究[J].地球物理学报,2006,49(1):162-169. |
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| 作者姓名： | 黄媛 杨建思 张天中 |
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| 作者单位： | 中国地震局地球物理研究所，北京 100081 |
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| 基金项目： | 国家“十五”科技攻关项目（2004BA601801）和地震科学联合基金项目（604012）资助.中国地震局地球物理研究所论著号05AC1026. |
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| 摘 要： | 将近台记录和区域台网数据联合用于双差地震定位算法，对2003年新疆巴楚-伽师MS68强震后404个ML≥35余震序列进行双差法重新精确定位，并对其进行了理论上的可行性分析. 精定位后定位结果与传统定位方法的原始定位结果进行比较发现：（1）精定位后震中分布图像更加集中，与当地的烈度考察和震源机制解结果更加协调；（2）震源深度优势分布集中在15～25km以内，与当地存在深度为10km以上低速沉积层的地质构造情况相一致；（3）精定位后定位残差由原来的394s降为024s，水平向估算误差平均可控制在11km以内，垂直向估算误差平均可控制在24km.
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| 关 键 词： | 余震序列 双差地震定位算法 近台影响分析 巴楚—伽师地震 |
| 文章编号： | 0001-5733（2006）01-0162-08 |
| 收稿时间： | 2004-11-22 |
| 修稿时间： | 2004-11-222005-09-26 |
Relocation of the Bachu-Jiashi, Xinjiang earthquake sequence in 2003 using the double-difference location algorithm |
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| HUANG Yuan,YANG Jian-Si,ZHANG Tian-Zhong.Relocation of the Bachu-Jiashi, Xinjiang earthquake sequence in 2003 using the double-difference location algorithm[J].Chinese Journal of Geophysics,2006,49(1):162-169. |
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| Authors: | HUANG Yuan YANG Jian-Si ZHANG Tian-Zhong |
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| Institution: | Institute of Geophysics, China Earthquake Administration, Beijing 100081, China |
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| Abstract: | Combining the data recorded at the mobile seismic network with those from the regional network, we relocated the 404 aftershock sequence including 404 events of ML≥35 for the 2003 Bachu Jiashi, Xinjiang MS68 earthquake by the double difference method and made theoretical analysis of the feasibility. We gota result of significant improvement. Compared with the original result, the relocation makes the image of earthquake distribution become more convergent and more consistent with the intensity investigation and the source mechanism. The dominant distribution of focal depths is in the range 15～25km and the result is more consistent with the local geologic setting that there is a low velocity sediment layer above the depth 10 km.The arrival time residuals reduce to 024s from 394s. The horizontal average error is estimated to be less than 11km and the vertical average error can been controlled less than 24km. |
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| Keywords: | Earthquake sequence The double-difference earthquake location algorithm Analysis the influence of near seismic station Bachu-Jiashi earthquake |
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